王坡煤矿陷落柱发育特征及其对煤层气开发的影响

摘要

陷落柱是影响煤矿区煤炭与煤层气开发的主要制约素之一。研究煤矿区陷落柱成及分布特征，有助降低煤炭开采与煤层气开发的风险。通过对陷落柱控制素和发育特征的分析，结合王坡煤矿已发现陷落柱的分布情况，探讨了陷落柱对王坡煤矿煤层气分布及其开发的影响机制。分析认为：陷落柱周围3号煤的气含量有所降低；在煤层气开发过程中，陷落柱可能会贯通奥陶系灰岩层与煤系地层，从而对煤层气的钻井、压裂以及排采工程产生不利影响。%Collapsed column is one of the main factors influencing coal mining and CBM development. Study on the origin and characteristics of the collapsed column in coal seam helps to reduce the investment risk in coal min-ing and CBM development. On the basis of the analysis of the control factors and development features of the collapsed column, combined with the distribution of the collapsed column in Wangpo coal mine, the effect mechanism on CBM distribution and development is studied. The gas content of seam No.3 is low around the collapsed column, and because the collapsed column may connect the Ordovician strata and coal seam, the collapsed column has an adverse effect on the drilling, the fracturing and the drainage engineering in CBM development.